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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SYNC_INTERNAL_API_BASE_TRANSACTION_H_
#define CHROME_BROWSER_SYNC_INTERNAL_API_BASE_TRANSACTION_H_
#pragma once
#include "chrome/browser/sync/internal_api/user_share.h"
#include "chrome/browser/sync/util/cryptographer.h"
namespace syncable {
class BaseTransaction;
class ScopedDirLookup;
}
namespace sync_api {
// Sync API's BaseTransaction, ReadTransaction, and WriteTransaction allow for
// batching of several read and/or write operations. The read and write
// operations are performed by creating ReadNode and WriteNode instances using
// the transaction. These transaction classes wrap identically named classes in
// syncable, and are used in a similar way. Unlike syncable::BaseTransaction,
// whose construction requires an explicit syncable::ScopedDirLookup, a sync
// API BaseTransaction creates its own ScopedDirLookup implicitly.
class BaseTransaction {
public:
// Provide access to the underlying syncable.h objects from BaseNode.
virtual syncable::BaseTransaction* GetWrappedTrans() const = 0;
const syncable::ScopedDirLookup& GetLookup() const { return *lookup_; }
browser_sync::Cryptographer* GetCryptographer() const {
return cryptographer_;
}
protected:
// The ScopedDirLookup is created in the constructor and destroyed
// in the destructor. Creation of the ScopedDirLookup is not expected
// to fail.
explicit BaseTransaction(UserShare* share);
virtual ~BaseTransaction();
BaseTransaction() { lookup_= NULL; }
private:
// A syncable ScopedDirLookup, which is the parent of syncable transactions.
syncable::ScopedDirLookup* lookup_;
browser_sync::Cryptographer* cryptographer_;
DISALLOW_COPY_AND_ASSIGN(BaseTransaction);
};
syncable::ModelTypeSet GetEncryptedTypes(
const sync_api::BaseTransaction* trans);
} // namespace sync_api
#endif // CHROME_BROWSER_SYNC_INTERNAL_API_BASE_TRANSACTION_H_
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